Bug ID 2038393: Looped dtls virtual can cause crash due to NULL dereference

Last Modified: Oct 15, 2025

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
17.5.1, 17.5.1.2, 17.5.1.3

Opened: Aug 25, 2025

Severity: 2-Critical

Symptoms

Tmm crashes while passing dtls traffic.

Impact

Tmm crashes

Conditions

An iRule uses the 'virtual' command to loop into a dtls virtual as a second virtual, and using serverside dtls on the first virtual.

Workaround

Do not use the virtual command or any other form to loop into dtls virtual.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips